taken from http://www.capsu.org/wow/catching_furious_crawdad.html
There are 17 pools in the set, any of which may spawn. These pools are spread across 3 different lakes, so don't expect to continually fish from one lake.
Each pool will typically respawn 60-65 minutes after it was last fished (emptied). It is very unlikely to respawn in less than 40 minutes, but will sometimes take as long as 90 minutes.
There is a maximum number of pools that will be visible at one time across the set, regardless of time since last catch. This number increases slowly with time when no fishing occurs, up to six. If you fish pools in quick succession the number tends to decline, until you are searching for just one pool.
There are 17 pools in the set, any of which may spawn. These pools are spread across 3 different lakes, so don't expect to continually fish from one lake.
Each pool will typically respawn 60-65 minutes after it was last fished (emptied). It is very unlikely to respawn in less than 40 minutes, but will sometimes take as long as 90 minutes.
There is a maximum number of pools that will be visible at one time across the set, regardless of time since last catch. This number increases slowly with time when no fishing occurs, up to six. If you fish pools in quick succession the number tends to decline, until you are searching for just one pool.